Which of the following is incorrectly paired?
a. villi—increase surface-to-volume ratio for absorption of nutrients
b. pancreas—secretes substances that neutralize stomach acid
c. gallbladder—produces bile that breaks down fat globules
d. colon—functions in water reabsorption
C
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If two genes are on the same chromosome,
a. crossing over occurs frequently. b. they assort independently. c. they are in the same linkage group. d. they are segregated during meiosis. e. an inversion will usually occur.
Matching. Choose the one most appropriate answer
for each. 1. ___ alveoli 2. ___ bronchi 3. ___ diaphragm 4. ___ epiglottis 5. ___ rib muscles 6. ___ larynx 7. ___ medulla oblongata 8. ___ oxyhemoglobin 9. ___ pharynx 10. ___ pleural sac 11. ___ trachea 12. ___ ventilation A. flexible windpipe reinforced with cartilage B. surrounds each lung C. oxygen-rich form of a respiratory protein D. contains two true vocal cords E. alter chest cavity volume F. part of the brainstem; controls breathing G. throat passage behind the mouth H. inhalation and exhalation I. connect trachea to lungs J. flaplike structure that points upward allowing air to enter trachea, but blocks the larynx during swallowing K. contraction increases thoracic volume L. microscopically small pockets lined with moist epithelium
The sequence of decreased death rate followed by a decrease in birthrate is called
A. environmental resistance. B. demographic transition. C. doubling time coefficient. D. replacement reproduction. E. a limiting factor.
Your physician has requested a test that involves radioactive iodine. This material will be injected and monitored to watch for normal rates of uptake. Test results reveal that the rate of uptake is abnormal. Which hormone would you predict to be outside of a homeostatic range?
A. Cortisol B. Growth hormone C. Atrial natriuretic peptide D. Thyroid hormone E. Insulin